The arrector pili muscle contracts and pulls hairs upright when we are cold or frightened
Indicate whether the statement is true or false
TRUE
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What is the origin of the postganglionic fibers that cause the pupil to dilate?
A. Optic ganglion B. Ciliary ganglion C. Splanchnic nerves D. Solar plexus E. Carotid plexus
The skeletal muscles store calcium ions in the terminal cisternae of the
A) sarcolemma. B) sarcomere. C) sarcosome. D) sarcoplasmic reticulum. E) sarcoplasm.
During development, some embryonic blood cells
A) differentiate into stem cells. B) move out of the peripheral tissues and into circulation. C) appear during the eighth week of development. D) enter the circulation to differentiate further. E) None of the answers are correct.
Transmission of sound through the middle ear results in
a. amplification of the pressure vibrations b. stimulation of middle ear receptor cells c. opening of the eustachian tube d. increased firing rate in sensory axons associated with the tympanic membrane e. none of the above